<html>
    <head>
        <title>东大主页</title>
        <style>
            .idl{
                width: 100px;
                height: 100px;
                background-color: rgb(214, 37, 37);
            }
            .idl2{
                width: 100px;
                height: 100px;
                background-color: blue;
            }
        </style>
    </head>
    <body>
        <div class="idl">
    <body>
</html>
